/* 基础应用容器，确保页面内容居中 */
.App {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  text-align: center;
  background-image: linear-gradient(to bottom, rgba(40, 44, 52, 52, 0.8) 0%, rgba(40, 44, 52, 52, 1) 100%);
  color: #ffffff;
  font-family: Arial, sans-serif;
}

/* 应用logo，增强视觉吸引力 */
.App-logo {
  height: 40vmin;
  margin-bottom: 1rem;
  filter: drop-shadow(0 0 4px 4px rgba(255, 255, 255, 0.2));
  transition: filter 0.3s ease-in-out;
}

.App-logo:hover {
  filter: drop-shadow(0 8px 8px rgba(255, 255, 255, 0.4));}

/* 动画效果，使logo旋转更平滑 */
@media (prefers-reduced-motion: no-preference) {
  .App-logo {
    animation: App-logo-spin 15s cubic-bezier(0.4, 0.25, 0.4, 1) infinite;
  }
}

@keyframes App-logo-spin {
  0% {
    transform: rotate(0deg);
    opacity: 0.8;
  }
  100% {
    transform: rotate(360deg);
    opacity: 1;
  }
}

/* 应用头部，增强深色背景质感 */
.App-header {
  padding: 4rem 1rem;
  background-color: #282c34;
  border-radius: 8px;
  box-shadow: 0 4px 4px 8px rgba(0, 0, 0, 0, 0.2);
  backdrop-filter: blur(4px);}

/* 链接样式，增加交互感 */
.App-link {
  color: #61dafb;
  text-decoration: none;
  font-weight: bold;
  transition: color 0.3s ease-in-out;}

.App-link:hover {
  color: #98e4fc;
  text-shadow: 0 0 2px 2px rgba(255, 255, 255, 0.5);}